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Routes

Bike touring routes & trails

France

Pays de la Loire

Châteaubriant-Ancenis

Nozay

Étang de Gruelleau – Abbaretz mine spoil tip loop from Le Vieux Bourg

Routes

Bike touring routes & trails

France

Pays de la Loire

Châteaubriant-Ancenis

Nozay

Étang de Gruelleau – Abbaretz mine spoil tip loop from Le Vieux Bourg

Moderate

riders

Étang de Gruelleau – Abbaretz mine spoil tip loop from Le Vieux Bourg

02:18

30.6km

120m

Cycling

Moderate bike ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels. The starting point of the route is right next to a parking lot.

Last updated: November 5, 2025

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Tips

Includes a segment in which cycling is not permitted

You'll need to dismount and push your bike.

62 m in total

Waypoints

Start point

Parking

Get Directions

11.2 km

A half-Mordor, half-Mad Max atmosphere with these reddish-orange marshes. The color is due to the oxidation of heavy metals contained in these highly acidic waters: iron, manganese, cobalt, and... arsenic. …

Translated by Google •

Tip by

22.2 km

Abbaretz mine spoil tip

Highlight • Other

A truly amazing site. Bring a lock, as you have to leave your bike at the bottom of the steps.

Translated by Google •

Tip by

22.4 km

Mine Lake

Highlight • Lake

This 40-meter-deep (!!!) pond occupies the former Abbaretz tin mine, which has been in operation since Roman times. It cannot be cycled around, but it is possible to do so …

Translated by Google •

Tip by

30.6 km

End point

Parking

Way Types & Surfaces

Way Types

15.3 km

10.4 km

3.67 km

1.14 km

< 100 m

Surfaces

14.2 km

9.55 km

6.27 km

529 m

< 100 m

Elevation

Weather

Today

Wednesday 19 November

9°C

0°C

0 %

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Max wind speed: 13.0 km/h

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Our route recommendations are based on thousands of hikes, rides, and runs completed by other people on komoot.

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Étang de Gruelleau – Abbaretz mine spoil tip loop from Le Vieux Bourg